KSM (Kerr-Sulphurets-Mitchell) Project

Projects that were undergoing a comprehensive study at the time the provisions of the Canadian Environmental Assessment Act, 2012 came into force will continue to follow the requirements of the former Act. Under the former Act, the Canadian Environmental Assessment Agency is responsible for conducting the comprehensive study of this project.

Seabridge Gold Incorporated proposes to develop a gold, copper, silver, and molybdenum mine in the Kerr, Sulphurets and Mitchell Creek watersheds. The project is located approximately 65 km northwest of Stewart, BC. The Project is expected to have an average ore extraction rate of approximately 130 000 tonnes per day over an anticipated 52-year mine life. Ore would be mined by a combination of open pit and underground mining methods from four mineral deposits: the Mitchell, Sulphurets, Kerr, and Iron Cap deposits. Waste rock storage dumps, an ore grinding circuit, water storage facility, water treatment plant, selenium treatment plant, several small hydroelectric projects, diversion tunnels, access roads, camp facilities, explosives factory and magazine, and supporting infrastructure would also be located at the Mine Site. A pair of 23 kilometer long tunnels would allow the transportation of crushed ore to a concentrator plant and tailings management facility located in the Treaty and Teigen Creek drainages of the Bell-Irving River. Electricity would be provided to the project via tunnel and transmission line which would connect to the Northwest Transmission Line. Two separate access roads, the Treaty Creek access road and the Coulter Creek access road, would provide access for the trucking of supplies to the mine and ore concentrate to Highway 37.

Latest update

January 8, 2015 - The Decision of Responsible Authorities has been taken.


External links

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KSM (Kerr-Sulphurets-Mitchell) Project
Environment Canada
401 Burrard Street
Vancouver, British Columbia V6C 3S5
Telephone: 604-666-2743
Email: EA.Referrals.PYR@ec.gc.ca

  • Location

    • Casey Point (British Columbia)
  • Nature of Activity

    • Mines and Minerals
  • Assessment Status

  • Start Date

  • Proponent

    Seabridge Gold Inc.
  • Authorities

    • Canadian Environmental Assessment Agency
    • Environment Canada
    • Fisheries and Oceans Canada
    • Natural Resources Canada
    • Transport Canada
  • Assessment Type

    Comprehensive study under CEAA 1992
  • Reference Number


This map is for illustrative purposes. The markers represent the approximate locations based on available data. More than one marker may be identified for a given assessment.

Nearby assessments

...within 200 kilometres
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